Here are the facts.

Está lloviendo a cántaros en Houston -- cats and dogs, baby, cats and dogs;

It is a 1km walk each way to work;

I keep my USB drive attached to my key chain;

My apartment keys are on my key chain;

I used my USB drive at work today, i.e., I plugged it into the computer;

THEREFORE

I had a hilarious 3km walk in the rain after work today because someone -- I'm not pointing any fingers -- left their apartment keys dangling from their office computer.